Check or safety valve.



A. E. BOSSI-i- GHEGK 0R SAFETY VALVE. APPLICATION IILED SEPT. 14, 1909.

1,021,758. Patented Apr;2;'1912 valves, and in suchconnection it has fpar rat-us with which'the valve is used will not UNITED STATES,

PATENT OFFICE;

ADOLPH E. BOSSE, OF PITTSBURGH, PENNSYLVANIA, AS SIGNOR TO ACME REFRIGER- ATING COMPANY, A. CORPORATION OF DELAWARE.

c'nncx on s-A rErrvAnvEf Specification; of Letters Patent.

. Patented Apr; 2, 1912.

To all whom it may concem:

Be it known that I, ADOLPH E. Bossii, .a citizen of the,United States, residing at Pittsburgh, in the county of 'Allegheny and 5 State of Pennsylvania, have invented certain new and useful Improvements in Check or SafetyValves, of whichl the following is a specificatiorL' My ihveiition relates to check or safety ticular relation to a check or safety valve which may be readily cleared or reground while-.in service without being dismantled, v to the end that the operation of the appabe interfered with, except in a minimum degree, whenever it is necessary to clean or regrind the valve.

.My invention finds a valuable application inconnect-ion with the ammonia systems of refrigeration plants. I The object, therefore, ofmy invention is to provide a simple, durable and efiicient valve construction for the purpose as afore- 5 said. f The nature and characteristic features of iny invention will be more readily understoo d from the following description taken in connection with the accompanying draw- 0 ings forming part hereof, in which,

Figure 1 is a longitudinal, central section of a valve structure embodying the-main features of my invention; Fig. 2 is a trans- Verse section taken on the line 22of Fig.

1; Fig. 3 is a perspective view of the valve 'valve disk 9 is a cylindr a vfllve'stem 12 disk and its'stem; and Fig. 4 is a similar View of a valve disk turning rod, constituting one of the principal elements of' my present invention. 5

Referring to the drawings, 5 is a 'cylin drical casing, having a threaded inlet 6 at one end thereof and a threaded outlet 7 extending from the, side in communication with the interior valve chamber 8.

9 is the valve disk having a-conical seating surface 1Q,which rests on the valve seat 11, and normally closesthe communication between the threaded inlet '7 and-thevalve chamber 8. Extending rearwardly from the which is guided and supported at. its outer end in aguiding member 13, which consists of a disk-like portion' 14 having its 'outer' periphery in threaded engagement with the complemental threads 15 at the rear portion' of the valve casing 13 and a sleeve 16 fornung the guide proper for the valve stem 12, which sleeve extends forwardly from'the disk 14, as clearly shovvnin Fig.1 of the drawings. A stufling box gland 17, having exterior threads 18, is. also screwed into the threads 15 at the rear portion of the valve casing .5. Loosely mounted in the stuffin'g box. gland 17, so as to 'be freely sl-idable and turnable therein, is a cylindrical rod 19, the inner end .ofwhich extends into the interiorof the sleeve of the valve -stem guiding and supporting sleeve16, and is'provided at its inner end with a transverse projection 20, which is adapted to engage a slot 21 in the outer end of'the valve stem 12. Suitable packing 22 is interposed between the inner surface "of the gland 17 and the disk lt of the valve stem supporting member, to prevent leakage of the fluid from the valve chamber 8 past the rod 19. Near the inner end of the rod 19 there is secured a pin 23 which extends downwardly from both sides of said rod and normally bears against a washer 24 arranged in the rear of the disk 14, forming a stop to prevent the rod 19 from being forced through the stufiing box under the pressure of the fluid in 'the valve chamber 8. The exterior end of the rod 19 may be provided with an aperture 25 fo'r'securing the same to any suitable form of. actuating device, such as a transverse pin, or ifdesired a crank may be secured 'to the outer end of the rod 19. The valve disk 9. is normally held on its seat by means of a helicahspring 26 which "surrounds the" valve stem 12 and bears at one end against;the;disk 9, and at its other end against the inner end of the valve stem supporting sleeve16.

It will of course be understood that the spring 26 may beof any desired strength for the particular tgpurpose or use of the valve, either as a check or safety valve as the case may be. It will also be seen that if desired the valve stem supporting member may be caused to occupyvarious positions within the valve casing 5 to thereby vary the strength of any given spring which maybe used. n

In the normal operation of the valve, the inner end of the 'rod'19. is maintained in its normal retracted position by the pressure of Y the fluid within. the valve chamber 8, so that no interference with the valve stem 12 will take place, and the valve disk 9 will at all times be free to act without interference from the turning rod 19. ,If, however, the valve should leak, either on account of extraneousmaterial getting between the faces of the valve disk and its seat, or on account of imperfections in the co-acting surfaces, the rod 19 may be pushed inwardly through the stuffing box until its projection 20 will engage in the slot 21 at the end of the valve stem 12, and the valve disk 9 may then be readily rotated to regrindthe surfaces and free any foreign matter which may become lodged therebetween.

Having thus described the nature and characteristic features of my invention, What I claim as new and desire to secure by Letters Patent is:

In a device of the character described, the combination of a valve casing having an interior valve seat, a valve disk normally valve casing behind said valve stem supporta ing member and packing interposed between said gland and member to form a stuflin box, and a rod extending through said stu ing box and adapted to'engage the valve stem to thereby provide means extending exteriorly for arbitrarily rotating the valve on its seat, saidorod being freely slidable and rotatable in saidistufling box.

In testimony whereof, I have hereunto affixed my signature in the presence of two witnesses. a

ADOLPH E. BOSSE.

Witnesses:

SARA EWING, MABEL E FERRELL. 

